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ASF GitHub Bot logged work on BEAM-4828: ---------------------------------------- Author: ASF GitHub Bot Created on: 08/Aug/18 23:24 Start Date: 08/Aug/18 23:24 Worklog Time Spent: 10m Work Description: rangadi commented on a change in pull request #6101: [BEAM-4828] Add Amazon SqsIO URL: https://github.com/apache/beam/pull/6101#discussion_r208766082 ########## File path: sdks/java/io/amazon-web-services/src/main/java/org/apache/beam/sdk/io/aws/sqs/SqsUnboundedReader.java ########## @@ -0,0 +1,166 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.beam.sdk.io.aws.sqs; + +import com.amazonaws.services.sqs.model.Message; +import com.amazonaws.services.sqs.model.MessageSystemAttributeName; +import com.amazonaws.services.sqs.model.ReceiveMessageRequest; +import com.amazonaws.services.sqs.model.ReceiveMessageResult; +import java.io.Serializable; +import java.nio.charset.StandardCharsets; +import java.util.ArrayDeque; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collection; +import java.util.List; +import java.util.NoSuchElementException; +import java.util.Queue; +import org.apache.beam.sdk.io.UnboundedSource; +import org.apache.beam.sdk.io.UnboundedSource.CheckpointMark; +import org.apache.beam.sdk.transforms.windowing.BoundedWindow; +import org.joda.time.Instant; + +class SqsUnboundedReader extends UnboundedSource.UnboundedReader<Message> implements Serializable { + + public static final int MAX_NUMBER_OF_MESSAGES = 10; + private final SqsUnboundedSource source; + private Message current; + private final Queue<Message> messagesNotYetRead; + private List<Message> messagesToDelete; + private Instant oldestPendingTimestamp = BoundedWindow.TIMESTAMP_MIN_VALUE; + + public SqsUnboundedReader(SqsUnboundedSource source, SqsCheckpointMark sqsCheckpointMark) { + this.source = source; + this.current = null; + + this.messagesNotYetRead = new ArrayDeque<>(); + this.messagesToDelete = new ArrayList<>(); + + if (sqsCheckpointMark != null) { + this.messagesToDelete.addAll(sqsCheckpointMark.getMessagesToDelete()); + } + } + + @Override + public Instant getWatermark() { Review comment: Could you include description about how watermark progresses in the main JavaDoc for `SqsIO`. Currently if the queue is idle, the watermark does not seem to progress. Is that ok? I will cause stuckness in the pipeline. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 132771) Time Spent: 7h 50m (was: 7h 40m) > Add Amazon SqsIO > ---------------- > > Key: BEAM-4828 > URL: https://issues.apache.org/jira/browse/BEAM-4828 > Project: Beam > Issue Type: New Feature > Components: io-java-aws > Reporter: John Rudolf Lewis > Assignee: John Rudolf Lewis > Priority: Major > Time Spent: 7h 50m > Remaining Estimate: 0h > > Add an SQS source > > For people who would like to follow progress or help out: > [https://github.com/JohnRudolfLewis/beam/tree/Add-SqsIO] -- This message was sent by Atlassian JIRA (v7.6.3#76005)